Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Quando a mudança é de 8,8%, qual é a densidade (pop/km²)?
 ###Tabelas: CREATE TABLE belting_system (belting_system_id AUTO_INCREMENT PRIMARY KEY, Evaluation average (From February 2011) INT, Evaluation average (From April 2009) VARCHAR, Evaluation average (Before April 2009) VARCHAR, % of negative evaluations VARCHAR, Submitting schedule on time VARCHAR, Punctuality/Attendance issues VARCHAR, Peak lessons taught INT) CREATE TABLE main_sites (main_sites_id AUTO_INCREMENT PRIMARY KEY, Transmitter VARCHAR, Service area VARCHAR, Radio 1 (MHz) VARCHAR, 2FM (MHz) VARCHAR, RnaG (MHz) VARCHAR, Lyric FM (MHz) VARCHAR, ERP (kW) VARCHAR) CREATE TABLE triathlon (triathlon_id AUTO_INCREMENT PRIMARY KEY, Athlete VARCHAR, Event VARCHAR, Swim (1.5km) VARCHAR, Trans 1 VARCHAR, Bike (40km) VARCHAR, Trans 2 VARCHAR, Run (10km) VARCHAR, Total Time VARCHAR, Rank INT) CREATE TABLE  (_id AUTO_INCREMENT PRIMARY KEY, Name VARCHAR, 2011 Census INT, 2006 Census INT, % change VARCHAR, Land area (km²) VARCHAR, Density (pop/km²) VARCHAR, Population rank INT) CREATE TABLE international_tourism_expenditure_2012 (international_tourism_expenditure_2012_id AUTO_INCREMENT PRIMARY KEY, Rank INT, Country VARCHAR, UNWTO Region VARCHAR, International tourism expenditure (2012) VARCHAR, International tourism expenditure (2011) VARCHAR)  
SELECT Density (pop/km²) FROM  WHERE % change = 8.8